Dolph



' (No Model.)

P. J. RICHARD. DIEPOR MAKING SPIRAL TUB-ING.

10.436,463. .l Pat-entedsepf. 16,1890.

'M 8 xi PATENT OFFICE.

FRED J. RIoHARD, or WATERBURY, oQNNEc'rIcUT, AssIeNoR To RAN- I DoLPH aoLowEs, v,on SAME PLACE.

DIE l-*oR'MAiu-hle SPIRAL TUBING.

A SPECIFICATION forming, part of Letters Patent No. 466,463, datedSeptember 16, 1890.A

Appiicaion nea June 5,1850. seri51N5.s54,352. (No 1.15551.)

.To all whom it may concern-l.

Be it knownthat I, FRED J. RICHARD, a citizen-of the United States,residing at Waterbury, in the county of New Haven and State ofConnecticut, have invented certain newand usefulImprovementsin Dies forMakingSpiral Tubing; and I do hereby declare the following to be a full,clear, and exact description ofthe invention, such as will ena-v bleothers skilled in the art to which it appel talus to make and use thesame. b

My invention has for its object the production of spiral ornamentationon tubing at a Single operation and upon an ordinary wiredrawing bench,thereby dispensing entirely with the use of machine-lathes and otherexpensive machinery in the manufacture of this class of tubing.

With this endin view I have devised a novel die for ornamenting tubing,of which the following description, in connection with the accompanyingdrawings, is a specification, numbers and letters being used to denotethe several parts.

Figure 1 is a central section through the die, showing a projection-forexample, d wheel or rib in elevation; Fig. 2, a' section on the line win Fig. 1, showing the wheel lying in a socket in the carrier; Fig. 3, asection of the die on the line y y in Fig. 2; and Fig. 4 is an elevationof a piece of tubing ornamented by my novel die.

My invention consists, essentially, of a die having a central opening,and projecting into said opening one or more suitable projections,preferably made adj ustable-for example, a smooth wheel or rib, or oneor more wheels or ribs, depending upon the pattern which it is desiredto produce, and the mode of use consists in passing a piece of plainltubing through the opening in the die and rotatingthe die as the tubingis drawn forward, the roller or rib acting to produce a spiral groovetherein. C

1 denotes a piece of ordinary plain drawn or brazed tubing, my inventionbeing applicable to all ordinary tubing, whether made of vbrass or othermetals or alloys, and 2 denotes a groove or grooves formed therein by mynovel die. The special mechanism by which the piece of tubing is drawnforward A and' the mechanism by which the die is rotated form no portionof my presentinvention.

In practicel I use an ordinary wire-drawing bench, iix the die in anysuitable manner in a rotating head,and move the tubing forward by anysuitable or preferred mechanism, the sole requirements of my presentinvention being a rotating die having a central opening and one or moreprojectionsextending into said opening and adapted to engage the surfaceof the piece of tubing, the number of projections orwheels useddepending, of Y course, on whether a single, double, triple, orquadruple spiral ornamentation is desired.

The die as a whole is denoted by A, the central opening by 3,`and theprojection extending into the opening by 4.

In practice I preferably use a roller or rollers to form the grooves,and have illustrated that form of projection in the drawings, a singleillustration only being deemed sufficient for the purposes of thisspecification.

The die is made in two or more sections, one or more of said sectionsbeing provided with an opening 5, extending inward to the centralopening, in which the carrier 10I forA the roller is socketed, theroller itself lying in` V a socket 14 in the carrier and turning freelyon a pin 6 passing through the carrier. The roller is made adjustable bymeans of a screw 11, the inner end of which is not threaded, and isconnected to the carrier by means of a pin 12, engaging half-grooves inthe carrier and inner end of the screw, as clearly shown in Fig. 2. Thethread of the screw engages a cap-piece 13, which is preferably castintegral With the central section and completely covers opening 5 andextends a sufficient distance over the other plates to give thevnecessary arnount of strength and rigidity. The screw is provided with anger-piece 15 for convenience in operation. The roller may thus beadjusted to produce any required depth of groove, and the adjustment maybe changed as often as may be required by simply turning screw 11 in orout. The roller or rollers may be mounted horizontally to the plane ofthe sections or slightly at an angle thereto. In practice I preferablymount the roller at a slight angle to the plane of the sections, asindicated in Fig. 3, and where but one roller is used form the die inthree sections, as shown in the drawings, each section being providedwith a central opening, which openings, when the sections are assembled,constitute opening 3. The opening in the outer section is preferablymade to are outward, as shown, so as to permit the ready insertion ofthe tube. The rear section is provided with a pin 7, (see dotted lines,Fig. 1,) which passes through the central section and into the frontsection, whereby the sections are held in alignment, and the sectionsare rigidly secured together by screws 8.

9 denotes a mandrel, which may or may not be used, depending upon thegage of the tubing that is being ornamented.

In ornamenting the heavier gages of tubing I use a mandrel approximatingin diameter the minimum diameter of the tubing after it isornamented,the mandrel entering the tubing loosely and acting as a support thereforto prevent irregular groovin g or tearing of the metal by theprojection.

The ornamental grooves may of course be either right or left handspirals, orboth right and left hand spirals, crossing each other,thereby producinga diamond-shaped pattern. Both the spiral and diamondornamentation may be considerably varied by making the spirals single,double, triple, or quadruple, as may be preferred, or by retracting andthen resetting the roller in the manner just described the surface ofthe tubing may be left alternately plain and ornamented.

Having thus described my invention, I claim- 1. A rotary die forornamenting tubing, having a central opening and formed in sections,substantially as described, suitably secured together, one or more ofsaid sections being provided with rollers the edges of which projectinto the central opening, as and for the purpose set forth. e

2. A rotary die for ornamenting tubing, consisting of three sectionsrigidly secured to- 'gether by a pin and screws, each of said sectionshaving' central openings which register with each other, the opening inthe forward section Haring outward, the central section being providedwith an `opening having therein an adjustable carrier provided with asocket 14, and a roller mounted in said socket, the edge of said rollerextending into the central opening, as and for the purpose set forth.

3. A rotary die for ornamental tubing, having a central opening andformed in sections suitably secured together, the central section havingan opening 5, extending to the central opening, a cap-piece 13, coveringsaid opening, a carrier 10, having a roller scketed' in'said opening,and a screw the Unthreaded head of which is loosely connected to thecarrier and the thread of which engages the cap-piece, whereby the capand roller may be adjusted, substantially as described.

4. A die of the class described, formed in sections rigidly securedtogether, the central section having an opening 5 and a cap-piececovering said opening, a screwpassing through the cap-piece andunthreaded at its inner end, and a carrier loosely secured to the innerend of the screw and having a roller adapted to

